Galumphs in, every sinew, let loose his tunderbolts
AS HE galumphs in smoothly from his run up and stretches every sinew to let loose histhunderbolts, Dale Steyn every inch looks a rugged predator pouncing on a prey. He makes compulsive viewing much like a VVS Laxaman in his true element. Even though he possess raw pace up his sleeve, with Steyn it’s not about blowing a batsman’s head off. Yet men armed to their teeth and whatnot often appear to be a mouse in a cat show bracing up to him. The South African pacer, with 13 wickets in three innings at an average of 15 so far, has asked difficult questions off the Indians, a side he relishes to bowl at. The 27-year-old completed the 15th five-wicket haul of his career when he induced a thick edge off Harbhajan Singh’s bat a delivery to AB de Villiers on day two of the second Test. His figures read 6 for 50.
Please explain to me the highlighted parts. Though I know galumph means "to walk/move/run" in general.
Source : Mumbai Mirror
Top answer
User_gary galumphs in It means "to move in a clumsy, ponderous, or noisy manner". Sinew is a organic substance, a tissue which unites your mscles to bones. User_gary to let loose his thunderbolts, To show his true and unshackled power.
— Fandorin
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