3 definitions by Halo 2 Killa

1. a phrase used as a declaration or recognition of greatness by oneself or another person, most often used in a congratulatory nature

2. an informal greeting between friends, replaces or adds on to "yo" to mean "hows it going", or "whats up"

3. a response to a greeting, and depending on vocal tones, can be used to convey a wide variety of moods

4. nonsensical lyrics used by Beanie Man at the beginning of the song Who Am I
Example 1:
Dude 1: Yo dude, remember that girl I was talking to at the club last night?
Dude 2: Yea.
Dude 1: Well afterward we went back to my place and she let me tap that!
Dude 2: Sim simmaaaaa!

Example 2+3:
Dude 1: Yo, sim simma?
Dude 2: Sim simma.

Example 4:
Beanie Man: Sim simma, who got the keys to my Bimmer?
by Halo 2 Killa December 22, 2008
When having sex, move left to right, as opposed to up and down or forward and back, this is most easlily done by laying on a sleeping bag, or any other slidy surface.
Dude, when I was bangin' my girl, I used the z-axis and she orgasmed like MAD.
by Halo 2 Killa June 7, 2005
When an officer on the battlefield gets wounded, and they give him so much drugs, that hes trippin balls.
Sgt. Johnson went on a field trip after he got shot in Vietnam.
by Halo 2 Killa February 16, 2006