To play the role of detective, to gather facts and information usually in the traditional Sherlock Holmes inconspicuous way.
To investigate in the manner of a detective.
A proper Sleuth needs to be intelligent, witty, and always a few steps ahead others. In fact, he never reveals all his discoveries or conclusions. His wisdom is his greatest asset and he needs to hide that wisdom if he expects to be hired for his services.
Verb. and Noun.
The situation when, after coitus, two people, in that case one male and one female, lay still on their sides (also called spooning), in which the penis of the male person remains inside the female person's vagina, until it ultimately becomes flask and inert. When the two people fall asleep under the effect of post-coitus endorphin, that's where the term takes all its sense. Do not mistake with the similar term Sleeping Bag.
'' I had a fabulous time last night ! We had loveful sexual intercourse, and then we remained in a sleeping vag.''