Viper's Kiss

When you take a shot of alcohol into your mouth and give somebody a kiss, sharing it.

Man, David's really feeling it today. He's had 8 shots and gave a chick a viper's kiss.

Viper kiss

When a woman gives a guy a blowjob, and after he ejaculates in her mouth, she cocks back her head and spits the load of semen in his face like a viper.

She gave him a viper kiss after sucking his cock last night! She spit it right in his face!