A lowlife, transeint or bum. Usually a person who is stinky and dishevelled in appearance.

A cruster is also referred to as a person who listens to the porno metal band "the Mentors".
1. Those people who hang out at that dive bar are a bunch of crusters.

2. If you listen to the band the Mentors? Your a cruster.
by Paul Della Valle April 22, 2004
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One who is crusty; either in attitude, behavior, or appearance.
1: My boss was being a real cruster last night by not letting me go home.

2: Don't be such a cruster!

3: What happened to your hair? You look like a cruster today.
by Ian Callahan January 5, 2006
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An older person, typically over 50, who tries to hang out with a much younger crowd, often dressing and acting like they were in high school again.
We went to go dancing Saturday night, but there were too many "crusters" on the dance floor, so we left.
by California Dreaming February 3, 2010
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Those crusty toenails you find on your nans feet.
My nan has many crusters
by 'relateable'garbage:) February 16, 2019
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A skate artist. One who consistantly slimes out of anything physically or mentally demanding. An individual who talks big game but never backs it up. Will repetitively tell the same story but with different details each time without realizing that he contradicted himself. A cruster will not own his own vehicle, and thereby mooches rides via the 'guilt trip' method. Paying gas money is completely out of the question, so don't ask. You will owe everything to a cruster. Always claims to be broke, yet always seems to have more than enough money for alcohol.
"You never run? You're such a cruster!"

"That girl called in sick 3 times in a row... what a cruster"
by xXSk8erChicAXx March 22, 2010
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A pristine, crisp, refreshing, cold beer in a can. 24 racks are preferred, but most frat stars enjoy 30 racks of crusters.
"Hey dude are we heading to the bars tonight? If so, we need to snag a 24 of crusters."

"I'm about to get super scripto after this 10th cruster."

"Toss me a cruster, bro."
by Scripto Cruster December 14, 2016
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When a crusten is in the act of buffering or distracted by a jelly bean.
Justin spent the entire shift crustering and going extra slow
by Dings666 July 24, 2019
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