The act of when someone goes to give you a high five, instead of slapping their hand, form a fist, stick your thumb out, and hit their open palm with the bottom of your hand (the part of your fist opposite your thumb sticking out) then proceed to wiggle your thumb while your hand is on their palm, saying "gobble gobble gobble."
Thus forming a turkey to thwart their efforts of slappin' five.
Turkeying someone refers to when someone is sleeping (or not), and another person physically touches their chin with their testicles, giving the appearance of a goose head. This behavior is extremely discriminatory and disrespectful and is not recommended.
"Hey man, did you hear about John and Tim's wild night last night? They were Turkeying everyone at the party."
"I can't believe Jim pulled off the ultimate Turkeying move last night at the party, the whole room was in stitches"