"Making a sideways fist, fingers facing the receiver, moving it left and right and simultaneously poking the inside of the opposite cheek with the tongue so it bulges out: This also has the same meaning as above and is equally offensive: it resembles fellatio and implies this is all the woman it is directed at is capable of achieving in life. (it may be performed by members of both sexes, thus.)"
- TheSabresTaco

wet blan·ket
ˈwet ˈˌblaNGkət/
nouninformal
a person who spoils other people's fun by failing to join in with or by disapproving of their activities.

not sure i comprehend how they are the same thing.. i think we have some wires crossed