Lemonade Mouth 

Lemonade Mouth - n. - A cotton mouth like side effect experienced after having urine expelled into the mouth.

Man, I just came back from the Men's Bath House and I've got a terrible case of Lemonade Mouth.

Lemonade Mouth by OxfordEnglishDictionaryRevised May 1, 2011

Two cocks in the mouth is better than three in the ass. 

modern day application of: "The lesser of two evils"

Child: "I can't decide what to do, mom. Should I lie to my new friend and tell her she looks good even though she doesn't? Or should I come straight out and tell her she looks god awful?"

Mom: "You know son, Two cocks in the mouth is better than three in the ass."

Child: "You're right! Thanks mommy!"

Two cocks in the mouth is better than three in the ass. by Jordan (Captain Awesome) November 6, 2006

Rusty Mouth harp 

Its when you perform a rusty trombone on a girl. Except its more like a mouth harp

Its like dueling banjos, but without the dueling or the banjos and with a mouth harp and an asshole thus making it a rusty mouth harp

Rusty Mouth harp by woonage December 19, 2008

sweet mouth 

when a dude always knows the right thing to tell or say to the girl even when hes lying. his game and words are just on point and you end up believing

OR
the bullshit guys tell girls when there trynna resolve the situation

i always believe dwayne even wheni know hes lying but his sweet mouth is so good

sweet mouth by black poca October 19, 2009

Good mouth piece 

Knows how to talk their way in.

He's got a good mouth piece, he can get whatever he wants by talking his way in.

He talks big.

Good mouth piece by Breeze's Koi March 6, 2012

marshmallow mouth 

The way a ho's mouth feels after giving blow jobs all night.

Oh snap, I have marshmallow mouth from giving so many blow jobs last night!

marshmallow mouth by the tea bagger April 13, 2014

make out mouth 

That chaffing you get around your mouth after a night of making out. Can get much worse if one person has a mustache.

Person A "Ummm... Why do you have a red rash all around your mouth??"
Person B "It's all right... I just have make out mouth"

make out mouth by tommiecat October 19, 2010