1) To chill/zone out in a setting surrounded by commotion, typically somewhere like a party, OR can also be used in the absence of commotion; picture chilling in your car at midnight
listening to music. Usually used in the context of zoning out to music, but can also be used to just convey the action of spacing out within the commotion (or lack thereof). 99% of the time use of the term requires the subject to be sitting or lying down, on a couch, chair, or similar object.
2) To be fully immersed and involved in music, requiring somewhat intense
participation in the music, whether it be singing, dancing, or (usually) both; sort of like raving. Also (typically) involves emotional evokation from the music, similar to what you would feel at your favorite concert. This is what sets trapping out apart from simply raving, where raving only requires intense
participation in the music, but does not require emotional evokation.
1)
Two and a half hours into the party, John was so far gone that he decided to lie down on the coach and trap out to the new
Travis Scott record that was playing
2) Last night, Darren, Scott, and Mike trapped out to live concert recordings all night; they woke their roomate up from
jumping up and down so much and you could hear them shouting the lyrics from outside
