In the movie Goodfellas, is he saying "Go feed your mother" or "Go feel your mother"?

The scene where Joe Pesci is at the table telling jokes and Ray Liotta
is also there.Its hilarious! Is it suppose to be some kinda Italian
mom joke like shes so dumb her son has to feed her or she's so ugly
her son has to feel her? HAHA!!
Ive only seen the TV version.