Episode #125 of the Stack Overflow podcast is here. We talk Tilde Club and mechanical keyboards. Listen now
4 of 4 Further clarified clumsy wording.

Finger food comes to mind. You were close with your thumb!

They are also conventionally called appetizers or hors d'oeuvres, even though according to the strict definitions appetizers or hors d'oeuvres precede proper meals, whereas at cocktail parties, an actual meal does not normally follow.