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1. To help out; to contribute or assist. Jim is always willing to pitch in with any housework that needs doing. Let me know if I can pitch in at all.
2. To throw, toss, or discard something casually in(to something else). In this usage, a noun or pronoun can be used between "pitch" and "in." The trunk should be empty, so just pitch your gear in. Here's the trash can—go ahead and pitch in those wrappers.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
pitch in (and help) (with something)
Fig. to join in and help someone with something. Would you please pitch in and help with the party? Come on! Pitch in!
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.
1. Set to work vigorously, as in We pitched right in and started mowing the field. [Colloquial; second half of 1800s]
2. Join forces with others; help, cooperate. For example, We were hoping you'd pitch in and sort the books. Also see pitch into.
The American Heritage® Dictionary of Idioms by Christine Ammer. Copyright © 2003, 1997 by The Christine Ammer 1992 Trust. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
1. To contribute something toward some general pool or effort: We all pitched in $10 to buy the couple a wedding gift. After the earthquake, local businesses pitched in with donations of food and water. When it was time to clean up the park, the neighbors pitched in.
2. To set to work vigorously: The grass had to be cut, so I started the lawn mower and pitched in.
The American Heritage® Dictionary of Phrasal Verbs. Copyright © 2005 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
McGraw-Hill's Dictionary of American Slang and Colloquial Expressions Copyright © 2006 by The McGraw-Hill Companies, Inc. All rights reserved.