Like Hercules, esp. in strength, courage, or labours; prodigiously powerful or vigorous; gigantic.

Of extraordinary activity, intensity, or magnitude; brisk, vigorous, energetic, ‘booming’; very large; ‘thumping’, ‘stunning’. slang or colloquial.

rushing, whizzing, etc.; also, very large or vigorous (cf. thumping, adj., whopping, adj.).

Exceptionally vigorous, powerful, strong, or impressive; fierce, tough, violent; wild, unruly. Also occasionally as adv.

Usually in form all-out. Carried out with or involving the utmost effort; vigorous. Hence: total, complete; full-blown.

Characterized by a high speed or tempo; fast, quick.

attributive. Making use of all available strength, resources, power, etc.; flat-out, all-out.