“Doyle Brunson” is slang for the hand 10‑2 offsuit, famously used by the poker legend.
Explanation. Named after the two-time WSOP champion who won major titles with this weak holding, 10‑2 offsuit is affectionately called “Doyle Brunson.” Despite being weak, it has a legendary status. The term is popular in poker culture and slang, often used humorously.