The grip you have when
you grab some guy by the testicles, hence having a "handful of nuts". Agonising
for men, it is a source
of endless amusement for onlookers and passers-by. Another
form of this term is "going the squirrel", which means that
someone is attempting
to grab someone else in a squirrel grip.
1: This guy picked a fight with me the other day, but I got him in the "squirrel grip" and he sure
changed his tune quickly.
A: This guy attacked Sophie in a dark
alley, so she "went the squirrel" on him and escaped. Poor
bastard'll be singing high-C from now on.