Ditzy dipsomaniacs (Aubrey Plaza and Anna Kendrick) bucking for a free Hawaiian vacation fill the need of the titular siblings (Adam Devine, whose performance fails to live up to his last name, and Zac Efron). The laughs never start as these four knotheads, whittled from the same block of wood, keep going in an f-bomb stuffed jumble of longform improv in which the dirtiest word is structure. This is the first feature from former SNL director Jake Szymanski — thus the overall skit-ish design — and his sluggardly handling of narrative-based makeshift dialogue plays like rehearsal footage. In a roundly unsatisfactory turn, Kendrick, generally a schmendrick, matches Plaza skank for skank. Spoiler alert: screenwriters Andrew Jay Cohen and Brendan O'Brien (Neighbors and its sequel) do a complete 180, ending their raunch-a-thon with an inapt scramble for the rom-com gold. (2016) — Scott Marks
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