Assuming you don't have a pump and you need to blow up an air mattress, there are a few ways to do it. One way is to use a straw. Another way is to use a vacuum cleaner with the hose attachment. And lastly, you can use your mouth.
If you're using a straw, insert the straw into the valve of the air mattress and start blowing. It might take a while, but eventually the mattress will start to inflate.
If you're using a vacuum cleaner, put the hose over the valve of the air mattress and turn the vacuum cleaner on. The mattress will start to inflate immediately.
If you're using your mouth, put your lips around the valve of the air mattress and start blowing. Again, it might take a while, but eventually the mattress will start to inflate.
There you have it! Three ways to blow up an air mattress without a pump.