Gaelic Tugboat Share definition Flag Gealic Tugboat <Gay-lick tugboat>Noun- When a white male inserts his own penis into his own rectum. "Incels are huge fans of Gaelic Tugboats, because they allow the incel to pleasure himself completely" Gaelic Tugboat by Sandy Snatchflap May 21, 2020 Get the Gaelic Tugboat mug.