An awkward unconsummated fist bump.

Person A goes in with a fist bump. Person B goes in with a handshake.
Both thinking they have done the wrong thing, and reverse their plan.
Now Person A goes in with a handshake, and Person B goes in with a fist bump.
At this point, both are feeling awkward and give up on the whole thing.

lil mad is like big mad but the opposite, you mad but not mad to the extent of pullin somthin