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1.
Giving a homeless man (or woman) a sandwich in exchange for a blow job.
We were downtown last night and decided to go flabberjack the local bums with our left over Subway sandwiches.
by Johnny H. July 06, 2006
 
2.
originating in sweden; the act of bribing a homeless person for a blowjob. speaking the word outloud is considered very offensive and a sign of low class
Tina: Lately, i practically have to flabberjack my boyfriend to get some head.
by ursella222222222222222 April 13, 2010
 
3.
A term applied to an overweight or obese male who suffers from frequently masturbates multiple times each day. Often referred to as chronic masturbation, a flabberjack usually masturbates 20 or more times per week.
"Look at that fat kid Jake. He's clearly a flabberjack."
by GrapeJelly February 13, 2014