London Irish ran in 13 tries to trounce Lusitanos in the Amlin Challenge Cup.
A hat-trick by Andrew Fenby, a penalty try and further scores by Guy Armitage and Tom Fowlie helped the Exiles to a 36-3 half-time lead.
Jebb Sinclair, Bryn Evans, Kieran Low, Declan Danaher, Tom Homer all touched down after the break, while Armitage and Fowlie both went over for a second time to complete the rout.
The win left Irish second in Pool Five, behind leaders Stade Francais.
Lusitanos, meanwhile, have now lost all five of their matches in the competition, conceding 277 points in the process, at an average of 55 points per game.
London Irish: Lewington, Fowlie, Armitage, Sa, Fenby, Geraghty, O'Leary, Parr, Mayhew, Halavatau, Evans, Rouse, Danaher, Low, Sinclair.
Replacements: Homer for Lewington (51), Hoadley for Geraghty (40), Cowan for O'Leary (40), Harris for Parr (40), Stevens for Mayhew (40). Not Used: Smallbone, Skivington, Dorrian.
Lusitanos: Pens: P. Leal. Lusitanos: Figueiredo, Miranda, P. Bettencourt Avila, L. Leal, G. Foro, Salema, P. Leal, Segurado, Tavares, Rocha, F. Almeida, D'Orey, Morais, Fragoso Mendes, Uva.
Replacements: Salgueiro for Fragoso Mendes (61). Not Used: Correia, J. Almeida, Domingues, Simoes, de Magalhaes, Lucas, Penha e Costa.
Ref: Claudio Blessano (Italy).