somebody knows what is birkat hacohanim?

Answer 1

It's the Jewish "priestly blessing" -- or Christians call it the benediction.
"May The Lord bless you and keep you.
May the Lord make his face to shine upon you, and be gracious to you.
May the Lord lift up his countenance upon you, and give you peace."

Birkat Kohanim [also spelled Cohanim] ("The Priestly Blessing"):
Birkat Kohanim consists of the three verses of blessings (for which reason it is called the berachah meshuleshet--"triple blessing"), found in Numbers 6:24-26, which were recited by the kohanim during the Temple service (where God's ineffable Name was enunciated), and later were incorporated into the daily prayers.

In relation to the account of Creation, and the Ten Commandments given at Sinai, which are seen to correspond to the two general principles of hishtalshelut (the "evolutionary" creative process) and hitlabshut (the actual "enclothement" and manifestation of Divine lifeforce within mundane reality), Birkat Kohanim represents the third principle of hashra'ah (the very essence of Divinity "inspiring" and blessing all of reality).

The text of Birkat Kohanim is often regarded as the "pearl" of the Written Torah, due to the beauty of the dual-progression inherent in its structure: its three verses are composed of 3, 5 and 7 words respectively, containing 15, 20 and 25 letters respectively. (The progression of words begins with 3, the number of blessings; the progression of letters begins with 15, the number of words.).

http://tinyurl.com/kujbf

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Answer 2

from a site I found online...

>>"What is Birkat Kohanim (Priestly Blessing)?
Birkat Kohanimis a ceremony that takes place during prayer services. The Kohanim, descendents of the Kohanim who served in the Temple, stand facing the congregation, and bless them, covered by a tallit (prayer shawl). The blessing includes three verses:
"Yevarekhekha Hashem Ve’yishmerekha"- May Hashem bless you and guard you.
"Ya’er Hashem Panav Elekha Ve’yekhuneka" - May Hashem illuminate His countenance towards you and be gracious to you.
"Yisa Hashem Panav Elekha Ve’yasem Lekha Shalom"– May Hashem turn His countenance to You and establish peace for you.
(Bamidbar chapter 6)
The chazzan, cantor, reads these three verses of the blessing word by word and the Kohanim repeat them after him. It is from these three verses that the nickname of the blessing is derived "Bracha Meshuleshet", i.e. the three-fold blessing. This blessing is also called "Nesiat Kapa'im", elevation of the hands, because the Kohanim raise their hands towards the congregation. "<<

many say it Cohanim... not with a K. but same difference.

iirc this blessing is frequently done on the person at their bar/bat mitzvah, and done on the whole congregation at certain other occasions.

Answer 3

The Priestly Blessing pronounced by the Temple Priests in the Temple in Jerusalem. Nowadays, the descendents of those Priests continue the tradition. On Festival days (outside of Israel) and everyday in Israel, the 'cohanim' recite the same blessings as did their ancestors as prescribed by God in the Torah.
From Numbers 6:23-27
May the Lord Bless You and Protect You
May the Lord Shine His Face to You and Be Gracious to You
May the Lord Turn His Face to You and Give You Peace

Answer 4

In one of the star wars films?

Or

It is a prayer heard in almost every synagogue and church
throughout the world:

"May the Lord bless you and keep you; may the Lord
cause his face to shine upon you and be gracious unto you;
may the Lord lift up his countenance upon you and grant you peace."