The act of taking the scrotum and testicles into ones mouth and putting the testicles into opposite cheeks. This may involve one or more sets of testes and include making a squirrel like smacking sounds.
Kathys' face is so chubby and bumpy it always looks like she's doing a three way squirrel-job.
The stag party in Vegas was awesome she went straight from a nut splitter, to a peeps-challenge to a full blownsquirrel job.