עושים לי - doing to me
a casual (arguably lazy) catch-all verb. i's guess it means waving, but it can be interpreted as both (not a huge difference in this case).
וואי-וואי-וואי expresses excitement/astonishment - "omg"
וואי לי - [as above] (to) me. usually (but not always) carries a negative undertone / oh, woe is me.
סחתן - arab expression. in hebrew means Kudos / "well done". (might have a different meaning in arab)
רג'אל - never heard it before. guess it's lgbt slang.