When you rub a girl's vagina with your hand outside of the her underwear, but inside her pants.
"I couldn't finger her because her parents were in the front seat. So I just gave her a hand sandwich."
by Jason Lemmon March 14, 2008
The handshake for which the shaker, sandwiches the shakee's hand between his/her two hands, the shaker tilts his/her head, and says something comforting.
John's dad just got hit by a car, so I gave him a comforting hand sandwich.
by SluseFAK December 01, 2007