You can omit 'in', but the statement itself is strange, since odd jobs are just occasional work. Please explain more about what you mean.
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Mister Micawbersince odd jobs are just occasional workActually I meant the regular work the person is doing everyday. By odd I meant it was not a rewarding work.
vsureshBy odd I meant it was not a rewarding work.Ah. Well, that is not what 'odd' means. I suggest:
Mister MicawberAh. Well, that is not what 'odd' means. I suggest:OK. I will be careful with odd. Thank you sir.