Referring to the various acts and degrees of a blowjob while maintaining never having given a full blowjob.
Bardalin: Hey! I didn't actually give him a blow job, I only had it in my mouth for like a minute.
Cranston: So it was like a slip of the tongue tip of the dong type situation?
Bradalin: Yea and I didn't go up and down I just kinda went side to side.
The use of the word "blue" to refer to sexually explicit content was first recorded in Scotland in 1824. "Blue" meant "lewd" because prostitutes dressed in blue gowns.