The very first thing to do with a slow Metamask account is to remove the transaction history. As the number of your Metamask transactions increases, your Metamask becomes slower. I think most users have already noticed that. If you have many transactions, the first thing is to 'remove' all these transactions.
Still, how do I raise my slippage on Uniswap?
To adjust your slippage tolerance, click on the gear icon located at the top right-hand corner on the Uniswap browser. There you can adjust your slippage tolerance.
Even in the case, how do I get a Uniswap token? To claim your tokens: Go to https://app.uniswap.org/. Connect the wallet that you previously used Uniswap with. Click on “Claim your UNI tokens”.
Incidently, how can I speed up my MetaMask?
In this case, you can either wait until the network is willing to process transactions at this price, or you can click that button that says "Speed Up". This will let you re-submit the same transaction, but for a higher fee that should be processed faster. To cancel the transaction, simply select "Cancel".
What slippage means?
1 : an act, instance, or process of slipping. 2 : a loss in transmission of power also : the difference between theoretical and actual output (as of power)