A software or hardware musical tool that allows you to lay down a sequence of notes over a series of measure(s).
It's commonly abused in conjunction with an arpeggiator by the musically uneducated.
Unclean fool: d00d u hav 2 see wut i jus made in FL studio!
Me: It's not just the same three chords arpeggiated over and over in the sequencer in 4/4 time is it? Please don't tell me the rhythm is just a bass drum playing pure quarter notes!
Someone who uses a music program (Noteworthy Composer, Anvil Studio, etc) to recreate music by ear in MIDI format. Usually taken from video games, movies, or general theme songs.
"Dude, I just found a MIDI of the Ghostbusters theme."
"Heh, I know the sequencer who made that."
A sunburn or suntan focused on the left arm. It is caused by the left side of the body being the only half that gets exposed to sunlight while driving. Presumably, it would be located on the right side of the body in countries where they drive on the left side of the road.