college try

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noun
  1. Informal. maximum effort for success on behalf of one's group, team, alma mater, etc. (usually preceded by the phrase the old): We may not make the deadline, but we'll give it the old college try.

Origin of college try

First recorded in 1950–55
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018