Said in disbelief, usually in reply to a potentially preposterous or unlikely statement, but can also be in recognition of an act.
Emphasis must be on the "ee" sound of both words, and accompanied by a stroking of the chin, regardless of presence or lack of own facial hair.
see variations at: Beee-aaard, bard, itchy chin, Jimmy, Jimmy Hill
Synonym: "yeah, right!"
Mr. A: My dick is 17.5 inches.
Mr. B: GrEEEEEn BEEEErd