What's a word to describe hidden sexual intention? e.g "Haha I was reading your profile and ...you seem pretty tight ;-)" How would I respond with a word that describes double meaning of a sentence to actually mean a sexual advance on the sly? Does that make sense? A play on words..
The one I am most familiar with is a double entendre. Merriam-Webster gives
noun dou·ble en·ten·dre \ˈdüb-əl-äⁿ-ˈtäⁿd(-rə); ˈdə-bəl-än-ˈtänd(-rə)\
1 : ambiguity of meaning arising from language that lends itself to more than one interpretation 2 : a word or expression capable of two interpretations with one usually risqué
The phrase Sexual Innuendo is what I would say they're using.
The term sexual innuendo has acquired a specific meaning, namely that of a "risqué" double entendre by playing on a possibly sexual interpretation of an otherwise innocent uttering. For example: "We need to go deeper" can be seen as either a request for further inquiry, or a request to go deeper into an intimate part.
The word is Double-Entendre. This can refer to any sentence with two meanings, but most often is used when one meaning of a sentence is innocent and the other is sexual.
If it has an unintentional sexual undertone, you might call it a Freudian Slip, implying that someone's sexuality accidentally expressed itself.
A colloquial phrase for this is "... if you know what I mean." This is useful for when you want to call to attention the sexual meaning a sentence can have.