There's a big, mossy, hollow log over yonder, and I remember that Mrs. Grouse once told me that that is strutter's thunder log.
In the most stately way you can imagine strutter walked the length of that mossy log.
Of course Peter said he did, and that was sufficient excuse for strutter to show off.
"walk in a vain, important manner," Old English strutian "to stand out stiffly," from Proto-Germanic *strut- (cf. Danish strutte, German strotzen "to be puffed up, be swelled," German Strauß "fight"), from PIE root *ster- "strong, firm, stiff, rigid" (see sterile). Originally of the air or the attitude; modern sense, focused on the walk, first recorded 1510s. Cognate with Old English ðrutung "anger, arrogance" (see throat). To strut (one's) stuff is black slang, first recorded 1926, from strut as the name of a dance popular from c.1900.