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| present tense | |
| I/you/we/they | clam up |
| he/she/it | clams up |
| present participle | clamming up |
| past tense | clammed up |
| past participle | clammed up |
This is the American English definition of clam. View British English definition of clam.
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a percussion instrument used by football fans which makes a rattling sound when shaken
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… the decision to treat the rights and duties of a company as being the same as the rights and duties of its shareholders
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